How do I move to a new phone or switch between iPhone and Android?

Use Set Up Another Device. It works between any two phones, including from iPhone to Android and back. On your old phone, go to Settings → Account → Set Up Another Device to show a QR code. On the new phone, install WitnessWork and choose Sign In with QR Code: during setup, tap "I already use WitnessWork", then From your other phone; after setup, it's in Settings → Account. Both phones show the same six-digit code. Check that they match, then tap Allow on the old phone. Both phones need the internet, and a code expires after 10 minutes. Your account and your buddies move to the new phone, and your old phone stays signed in. If the new phone used Buddies with another account, it asks first: that account's buddies stay on its other signed-in devices, or are removed for good if this was its last one. To bring your service records, contacts, and notes too, use Cloud Sync, which works between iPhone and Android: once it's on for the new phone, your records arrive without a restore step. Or turn on Backup in Settings → Account on the old phone first: the new phone then offers to restore them. iCloud Sync and Google Drive Sync work between phones of the same kind, and a backup file from Settings → Backup & Restore works between any two. The account travels end-to-end encrypted, so the server can't read it, and it keeps nothing once the new phone has it.